Alkylation of Alkylphenol, Alkoxyphenol and Their Mixture with Methanol under the Catalysis of Alkali and Alkaline-earth Salts Modified Activated Alumina

Shaohua ZHANG  Ze WANG  Weigang LIN  Wenli SONG  Songgeng LI

doi:10.12034/j.issn.1009-606X.217162

The Chinese Journal of Process Engineering >

2017 , Vol. 17 >Issue 6: 1239 - 1248

DOI: https://doi.org/10.12034/j.issn.1009-606X.217162

Process & Technology

Alkylation of Alkylphenol, Alkoxyphenol and Their Mixture with Methanol under the Catalysis of Alkali and Alkaline-earth Salts Modified Activated Alumina

Shaohua ZHANG Ze WANG Weigang LIN Wenli SONG Songgeng LI

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1. State Key Lab of Multi-phase Complex Systems, Inst. Process Eng., Chinese Academy of Sciences, Beijing 100190, China; 2. School of Chemistry and Chemical Engeering, University of Chinese Academy of Sciences, Beijing 100049, China; 3. Department of Chemical and Biochemical Engineering, Technical University of Denmark, Denmark Lyngby DK-2800

Received date: 2017-03-06

Revised date: 2017-04-11

Online published: 2017-12-05

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Abstract

Using methanol as the alkylation reagent, the alkylations of alkylphenol, alkoxyphenol, and their binary and five-component mixtures were investigated, under the catalysis of alkali (A) and alkaline-earth (AE) salts modified activated alumina (AA). The results showed that phenol and methylphenol can high efficiently be converted to O-alkylation products over A/AA. Specifically, under the catalysis of Cs2CO3/AA, the conversion rate of phenol reached to the highest value of 90.4%(?) with high anisole selectivity of 96.1%(area). However, under the same reaction conditions, neither the conversion rate nor the product selectivity is satisfactory for the alkylation of methoxyphenol, and the adjustment of the reaction temperature, the space velocity, or the Cs loading amount cannot make the results better. There exists a strong synergistic effect for the co-alkylation of the alkylphenol/alkoxyphenol mixture, under this effect, the conversion of alkylphenol is inhibited, while the conversion of alkoxyphenol is promoted, with remarkably enhanced selectivity to C-alkylation products.

Key words： alkylation; alkylphenol; alkoxyphenol; catalysis; alkali metal

Cite this article

Shaohua ZHANG Ze WANG Weigang LIN Wenli SONG Songgeng LI . Alkylation of Alkylphenol, Alkoxyphenol and Their Mixture with Methanol under the Catalysis of Alkali and Alkaline-earth Salts Modified Activated Alumina[J]. The Chinese Journal of Process Engineering, 2017 , 17(6) : 1239 -1248 . DOI: 10.12034/j.issn.1009-606X.217162

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